feat: asset tags/ids (#142)

* add schema

* run db migration

* bulk seed asset IDs

* breaking: update runtime options

* conditionally increment asset IDs

* update API endpoints

* fix import asset id assignment

* refactor display + marshal/unmarshal

* add docs page

* add to form field

* hide 000-000 values

* update ENV vars

backend/internal/core/services/all.go

@@ -8,17 +8,38 @@ type AllServices struct {
 	Items *ItemService
 }
 
-func New(repos *repo.AllRepos) *AllServices {
+type OptionsFunc func(*options)
+
+type options struct {
+	autoIncrementAssetID bool
+}
+
+func WithAutoIncrementAssetID(v bool) func(*options) {
+	return func(o *options) {
+		o.autoIncrementAssetID = v
+	}
+}
+
+func New(repos *repo.AllRepos, opts ...OptionsFunc) *AllServices {
 	if repos == nil {
 		panic("repos cannot be nil")
 	}
 
+	options := &options{
+		autoIncrementAssetID: true,
+	}
+
+	for _, opt := range opts {
+		opt(options)
+	}
+
 	return &AllServices{
 		User:  &UserService{repos},
 		Group: &GroupService{repos},
 		Items: &ItemService{
-			repo: repos,
-			at:   attachmentTokens{},
+			repo:                 repos,
+			at:                   attachmentTokens{},
+			autoIncrementAssetID: options.autoIncrementAssetID,
 		},
 	}
 }